In examining your return further, I notice there may have been some missing information you needed to complete.  The amount of $5217 is an amount that may have been calculated erroneously due to the limited information that was provided in the return. As I looked over your California return, there seemed to be some information missing.  Here is how I suggest to proceed with your return.

Delete your California and Colorado returns completely. I am suggesting you re-enter with a clean copy. If in TruboTax online, go to your state returns and delete. Once deleted, here is how I want you to proceed.

1. Begin with your CA non-resident return. Start to prepare it.  
2. In the first screen, indicate that the child was a California non-resident for the entire year since he/she is there strictly for education.
3. Continue through until you see the screen that says residency information. Here you will also say your child is a full-year non-resident. Don't put anything in for move in/move out dates for 2025.
4. Now continue until you reach a screen that says Child with investment income
5. It will then ask you to review the information on Federal Form 8615.  If it is correct, press continue.
6. In the second screen after the review, you need to enter you (the parents) taxable income on their Ca Form 540 NR. If there is none, put 0.
7. now it will repeat asking the child's investment income and how much of it is taxable in Ca. If not taxable, put "0".

Now with everything said and done, line 18 will drastically change because it now compares the tax computed in the line 17 Smart Tax worksheet line B with the amount on Line 6 and the difference will be recorded in line 18.